One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,5,7,8)(9,10)(11,15)(12,13)(14,16)(17,18,21,22)(19,23,24,20)(25,26)(27,29)(28,31)(30,32)(10,13)(11,16)(18,22)(19,24)(26,27)(28,32) involution — undirected(10,13)(14,15)(19,24)(20,23)(25,26,29,27)(28,31,32,30)(1,2)(3,5)(4,6)(7,8)(9,11,12,16)(10,14,13,15)(17,19)(18,23)(20,22)(21,24)(25,27,29,26)(28,31,32,30)(1,3,4,7)(2,5,6,8)(9,10)(11,14)(12,13)(15,16)(17,20,21,23)(18,19,22,24)(25,28,29,32)(26,30,27,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.